摘要随着我国汽车工业的不断发展，人们对汽车的舒适性和安全性的要求也越来越高，而减振器作为悬架系统的主要部件，其质量直接影响到车辆乘坐舒适性和操纵稳定性。本文设计出适用于某特种车辆的双作用液压筒式减振器。液压筒式减震器是汽车上应用最广泛的减振器。59845

首先根据已知条件计算出减振器的相对阻尼系数，确定减振器结构组成和零部件尺寸。运用solidworks软件进行三维建模，用AutoCAD实现三维实体到二维工程图。建立流体力学模型，运用Fluent软件对减振器拉伸行程及压缩行程的阀门运动进行分析，最后完成速度特性分析和主要部件的强度校核，完成整个减振器的设计。

毕业论文关键词  双作用液压筒式减振器  相对阻尼系数   流体力学模型  强度校核

毕业设计说明书（论文）外文摘要

Title   shock absorber design of a special vehicle

Abstract

With the continuous development of China’s automobile industry, People’s requirements in comfort and safety have become more sophisticated. And the shock absorber is the main component for suspension system .Its quality have a direct impact on traveling comfort,vehicle handling and stability. The double-acting hydraulic drum shock absorber which applicable to the Special Vehicles is designed in the paper. Hydraulic drum shock absorber is most widely used in the automotive.

First of all ,the relative damping coefficient of the shock absorber is calculated according to the known conditions . Determine the structure composition and parts size. Finish three-dimensional modeling using solidworks software.And Generation of 2D Engineering Drawing with AutoCAD . Then a hydrodynamic model is set up. Make an assay of valve motion in both drawing stroke and compression stroke using Fluent software. The valve and the department are calculated. At last the strength of the main parts of the shock absorber is checked and the assay of speed characteristics.Complete the design of the entire shock absorber.

Keywords    Double-acting hydraulic drum shock absorber  Relative damping coefficient    Hydrodynamic model     Strength check 

1  引言 1

1.1  本课题设计的目的及意义 1

1.2  减振器国内外的发展状况和发展趋势 1

2．减振器阻尼值计算和机械结构设计 3

2.1  整车参数 3

2.2相对阻尼系数和阻尼系数的确定 4

2.2.1悬架弹性特性的选择 4

2.2.2相对阻尼系数 的选择 4

2.2.3  减振器阻尼系数 的确定 5

2.3最大卸荷力 的确定 6

2.4缸筒的设计计算 7

2.5 活塞杆的设计计算 7

2.6活塞行程的确定 8

2.7液压缸壁厚、缸盖和最小导向长度的计算 9

2.7.1液压缸的壁厚的计算 9

2.7.2缸盖厚度的计算 10

2.7.3最小导向长度的确定 11

2.8导向套滑动面长度和活塞宽度的设计计算 11

2.9液压缸结构设计 11

2.10阀系设计